The RaidLight Press-to-Drink EazyFlask is a lightweight, collapsible soft flask designed for runners and outdoor enthusiasts. It features a press-to-drink system with an extended valve, allowing for easy hydration without removing the flask from its holder. The flask compresses as you drink, minimizing water movement and saving space. It's compatible with all RaidLight packs (except the Ultralight 5L pack) and is available in various capacities, including 600ml and 750ml.